is there a 'select case' command in maple?

This is what what i would write in Vb. how do I write something similar in maple?

For j = 15 To 27 Step 3
                For k from 1 To 3
                    Select Case k
                    Case 1
                        ru = 0
                    Case 2
                        ru = 0.2
                    Case 3
                        ru = 0.5
                    End Select

end do

end do

end do

help???